Loans to and Investments In Associated Companies (Linkem) (Narrative) (Details) - Linkem	9 Months Ended
	Sep. 30, 2018
Investments In Associated Companies [Line Items]
Equity method investment, ownership percentage	42.00%
Stated interest rate on convertible notes	5.00%
Percentage of ownership upon conversion of note	54.00%
Equity method investment, voting percentage	48.00%
Convertible Preferred Stock
Investments In Associated Companies [Line Items]
Equity method investment, ownership percentage	63.00%